Rich,
Without a spoiler it mounts through the lower holes shown under the deck lid and closest to the rear lip (circled in white). When the factory spoiler was added, it moved the emblem 3.27 inches forward to the next set of angled holes (circled in orange) and the bottom of the emblem should then be 1-1/4" forward of the front edge of spoiler. The O on the right side of Camaro should measure 4" in from the outer edge of the decklid, and that should have it about 1/4" to the inside of the right edge of the wide stripe. Photo courtesy of CRG
